Abstract: Damage caused by displacement of a rotating shaft is prevented with an acceleration sensor. A centrifuge according to the present invention includes a rotor, a driving source that rotates the rotor, a rotating shaft that links the rotor with the driving source, an acceleration sensor, and a control unit. The acceleration sensor outputs a value indicating acceleration in at least two different directions which are orthogonal to an axial direction of the rotating shaft. The control unit obtains a displacement conversion value corresponding to a value, which is obtained by dividing a value which is proportional to acceleration based on a value indicating acceleration and outputted by the acceleration sensor, by a value which is proportional to a square of an angular velocity of the rotor, and stops rotation of the rotor when the displacement conversion value satisfies a displacement determination criterion which is predetermined and indicates that displacement is large.

Abstract: Accurate measurement of acceleration caused by imbalance in the balance of a rotor is realized even in high-speed rotation with an acceleration sensor which has a processing speed required in low-speed rotation and a control unit. A centrifuge according to the present invention includes a rotor, a drive source for rotating the rotor, a rotating shaft for coupling the rotor and the drive source, an acceleration sensor, and a control unit. The acceleration sensor outputs values indicating acceleration in two different directions which are perpendicular to an axial direction of the rotating shaft. The control unit obtains an acceleration corresponding value, which is a value corresponding to acceleration in a direction perpendicular to the axial direction of the rotating shaft, based on values indicating acceleration in the two different directions and stops rotation of the rotor in a case where the acceleration corresponding value satisfies a determination criteria.

Abstract: Damage caused by displacement of a rotating shaft is prevented with an acceleration sensor. A centrifuge according to the present invention includes a rotor, a driving source that rotates the rotor, a rotating shaft that links the rotor with the driving source, an acceleration sensor, and a control unit. The acceleration sensor outputs a value indicating acceleration in at least two different directions which are orthogonal to an axial direction of the rotating shaft. The control unit obtains a displacement conversion value corresponding to a value, which is obtained by dividing a value which is proportional to acceleration based on a value indicating acceleration and outputted by the acceleration sensor, by a value which is proportional to a square of an angular velocity of the rotor, and stops rotation of the rotor when the displacement conversion value satisfies a displacement determination criterion which is predetermined and indicates that displacement is large.

Abstract: There can be provided a bucket for a swinging rotor of a centrifugal separator that can be readily carried while ensuring the sealability at the time of a centrifugal treatment or the carriage operation. The bucket includes a bucket body (11) in a bottomed cylindrical shape, a cover main body (21) (cover), a packing (22) (seal member), and a pair of attachment mechanisms (34) configured to detachably attach the cover main body (21) to the bucket body (11). The cover main body (21) includes a lid portion (24) having clip fixing portions (31) (pressed portions) and configured to cover an opening (11a) of the bucket body (11), and a handle portion (25) formed integrally with the lid portion (24). The handle portion (25) is stretched between the pair of clip fixing portions (31). A handle concave portion (36) (hole) that opens toward the outside of the cover main body (21) and separates the lid portion (24) and the handle portion (25) is formed between the lid portion (24) and the handle portion (25).

Abstract: An attachment fitting is attached inside a rotor hole. The attachment fitting is made up of a main body, first and second pieces disposed in a piece placement hole formed in the main body so as to pass therethrough in a direction orthogonal to a rotation central axis of a rotor, a leaf spring including two arm portions, and a retainer that is mounted on the main body and puts a base of the leaf spring between the retainer and the main body. The first and second pieces have grooves into which the arm portions of the leaf spring are inserted. When the rotor rotates, the first and second pieces protrude from the piece placement hole by the centrifugal force against the spring force of the leaf spring and make contact with a rotor coupling portion of a shaft.

Abstract: An attachment fitting is attached inside a rotor hole. The attachment fitting is made up of a main body, first and second pieces disposed in a piece placement hole formed in the main body so as to pass therethrough in a direction orthogonal to a rotation central axis of a rotor, a leaf spring including two arm portions, and a retainer that is mounted on the main body and puts a base of the leaf spring between the retainer and the main body. The first and second pieces have grooves into which the arm portions of the leaf spring are inserted. When the rotor rotates, the first and second pieces protrude from the piece placement hole by the centrifugal force against the spring force of the leaf spring and make contact with a rotor coupling portion of a shaft. In a structure that allows the rotor to be attached to the shaft by simply being put onto the shaft, assembly on the rotor's side can be easily performed.

Abstract: A tube rack of a centrifugal separator, in which a bottom rubber portion can be readily mounted and readily replaced, and yet such bottom rubber portion cannot be easily separated. The tube rack includes a holder (14) including a plurality of tube holes (12) each configured to accommodate a tube that is used for a sample and each includes an opening at one end portion of the holder serving as a tube insertion side, and an opening at a bottom portion of the holder that is at the other end. The tube rack includes a bottom rubber portion (15) including a plurality of bottom rubber members (25) each fits in the tube hole (12), and including connecting pieces (24). The tube rack includes a base (13) formed in a cylindrical shape having a bottom configured to accommodate and detachably hold the holder (14) and the bottom rubber portion (15), and to be inserted into a bucket of the centrifugal separator.

Abstract: Accurate measurement of acceleration caused by imbalance in the balance of a rotor is realized even in high-speed rotation with an acceleration sensor which has a processing speed required in low-speed rotation and a control unit. A centrifuge according to the present invention includes a rotor, a drive source for rotating the rotor, a rotating shaft for coupling the rotor and the drive source, an acceleration sensor, and a control unit. The acceleration sensor outputs values indicating acceleration in two different directions which are perpendicular to an axial direction of the rotating shaft. The control unit obtains an acceleration corresponding value, which is a value corresponding to acceleration in a direction perpendicular to the axial direction of the rotating shaft, based on values indicating acceleration in the two different directions and stops rotation of the rotor in a case where the acceleration corresponding value satisfies a determination criteria.

Abstract: There can be provided a tube rack of a centrifugal separator, in which a bottom rubber portion can be readily mounted and readily replaced, and yet such bottom rubber portion cannot be easily separated. The tube rack includes a holder (14) including a plurality of tube holes (12) each configured to accommodate a tube that is used for a sample and each includes an opening at one end portion of the holder serving as a tube insertion side, and an opening at a bottom portion of the holder that is at the other end. The tube rack includes a bottom rubber portion (15) including a plurality of bottom rubber members (25) each fits in the tube hole (12), and including connecting pieces (24). The tube rack includes a base (13) formed in a cylindrical shape having a bottom configured to accommodate and detachably hold the holder (14) and the bottom rubber portion (15), and to be inserted into a bucket of the centrifugal separator.

Abstract: A centrifuge rotor cover has a lid, a circular plate attached to the lid with click holes formed in a circle, a knob and knob shaft, a plate spring attached to a surface of the knob facing the circular plate and an elastic body pushing the lid against the rotor depending on the distance between the knob and the lid. If this distance is equal to or less than a predetermined value, the plate spring is caught repeatably in the click holes as the knob is turned to cause sounds and vibrations that indicate the knob is not tightened securely.

Abstract: The lid-section mechanism for rotors comprises a lid, a knob, a knob shaft, a circular plate, a plate spring, and an elastic body. The circular plate is attached to the surface of the lid that faces the knob and has click holes that are formed on a circle. The plate spring is attached to the surface of the knob that faces the circular plate and, if the distance between the knob and the lid is equal to or less than a predetermined value, the plate spring is caught in the click hole. The elastic body pushes the lid against the rotor depending on the distance. Turning the knob when the distance is equal to or less than the predetermined value repeats the cycle in which the plate spring is caught in the click hole and then the plate spring is bent and removed from the click hole.